Punching and riveting machine



Nov. 8, 1927.

G. E. WEAVER ET AL.

PUNCHING AND RIVETING MACHINE yFiled May 20, 1927 Patented Nov. 8, 1927.

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GAILARD E. WEAVER Arti) nanars. Bnnrrueroit, or srnmerrnnn, ILLINOIS, as-

sIGNons To wnnvnn Mnuuracrua-Ine courants; or SPRINGFIELD, ILLINOIS, A

i CORPORATION OF ILLINOIS.

FUNCHKING LND RTLVETITG MACHINE.

Application filed May 20,

The present invention has for its leadingl aim and principal object the provisionot an appliance adapted to exert suitahlepressure for performing various operations depending upon the tools used, the apparatus being particularly adapted Jfor employment in relinin'g brake-bands and the like. hut its de siralole and satisfactory use is not limited to any particular type of worinV I One salient feature of the n-ew and improved machine is Jche securing of an ade quate working torce with the expenditure of a. relatively small amount of eiiort on the part of the `operator and they equal travel or l5 movement of the tool on each actua-tion. so

that. for instance, in the relining ci' 1orakehands, the head-s of all ot the rivets may he countersunk like amounts.

Another characteristic of the novely applianceisthat it is simple in structure and hence economical to manufacture, with small likelihood of becoming injured or impaired in ordinary service.

To enable those acquainted with this art to fully understand the invention, in the accompanying drawing, forming a part of this specilication and ythroughout the views y ot which like reference characters haverheen used to designate the same parts, apresent `desiralole and preferred embodiment of the invention has been shown in detail.

In this drawing: n

i `Figure 1 is a central vertical section through the apparatus;

Figure 2 is a top plan view on' an'enlarged scale;

" Figure 3 is a detail section of the adjust-r ahle mounting o'f lone of the punches;fand

Figure L1 is a section on line 4-4 of Figure 3. v

Referring to this drawing7 vit will benotod that the machine includes a hollow hase 11 adapted to rest on the floor and carryingV an upright, tubular standard 12 to which a suitably-shaped head 13 is attached.

A horizontally-rotatahle turret 141 has van 'outstanding lower section'l recessed at ya plurality of points 16, 16 for the accomi modation of a numherot dies 17. 1i', `and iq a similar upper section 18 with upright hearings 19,19 in exact alignment or register with the correlated dies, such hearings slid` ingly receiving rams or plungers 20, 20'

19er. serial No. 192,826.

equipped at their klower ends with punches 21. 21 complementary to the associated dies. rlhe upper end ofl each suchplunger or ram is threaded through a nut 22 and has a knurled head 23h51 means of which the ram and its mating; punch may he easily adjusted toward and from the companion die.

-lilach such nut has lateral top and bottom taceshearing on upper and lower Curved spring 36 interposed between such cup and the hottom end oi" sleeve'29, whereby the springt tends to raise 'the' spider or crosshead and its'plurality offrams and punches.

long'. upright-rod 37 extends through the spider 28 sleeve 29. turret 14, sleeve 34, spring' 36, and cup 35. being threaded at its upper end -tor the reception of a nut 38 which is ot suiicient size to overlapl the spider`` so that when the rod is pulled down ythe spider and associated elements will he carried with it in opposition to the upwardly-pressinp; action of spring 36.

The lower end oit pull-rod 37 has a. swivel connection 39 with 'a'lever 40 tulcrumed in the lower hollow hase at 41. a link 42 joining` an intermediate part ci the lever to a short extension 113 on a curvedl` stop-arm 411- tastened to a shatt15` oscillatoryin hearings in thehase 11, suchkshaft. outside of hase,

also having a foot-leverv or pedal 16 keyed `thereto andsupplied with arrearward projection 17 connected hya coiled contractile spring 148 to the shaft on which the lever l0 is mounted7 whereby the spring normally umpcrated element.

From the foregoing, it will he apparent lifts the pedalor treadle until the end of arm/1st strikes the top of lever i() thus limitthat the two springs and L18 supplement one another in their actions, both tending to elevate'the cross-head and its rams and tov raise the foot-lever.

It is to be noted particularly that the link 42 and the short arm t3 constitute a toggle which is straightened out as the pedal is depressed, and, inasmuch as such toggle has a definite range of action when its elements are brought into alignment, a Vfull depression of the foot-lever assures thatthe rams and punches will descend equal amounts on each actuation, thus enabling the workman to be certain that all rivet-heads are countersunk or embedded in the brake-lining to equal extents.

The operation ot, the apparatus will be apparent from what precedes, but it may be noted that the turret may be easily turned manually7 to bring any set of cooperating tools tothe front of the machine in position for convenient use, the cross-head, of course, turning in likey degree because its rams are directly associated with the=turret, and, furthermore, the pull-rod may also turn with the turret due to the structure ofthe c0nnection 39. Y

Adjustment of vthe punches individually maybe readily eifected by turning the ram heads 23 and in this way the depth of punching and countersinlring may be regulated as vmay be required by variations in the thickness of the brake-bands and the linings.

After the plungers or rams have'breen thus adjusted for the particular work in hand, all of the holding rivets are countersunk to a uniform depth because identityor sameness of pressure is insured by thelever and toggle actions of theV pedal.

The invention 1s not necessarily limited Vand restricted to this particular embodiment and many mechanical changes may be incorporated `therein without sacrificing any of the substantial benefits and advantages of the invention and` without departing from its substance or essence as defined by the appended claims.

We claim:

l. In a machine of the character described, the combination of a base, a hollow standard extended upwardly therefrom, a head at the top ofsaid standard, a turret revoluble on said head, rams slidable in bearings in said turret, a cross-head carrying said rams, a iirst sleeve slidable in said turret lcarrying said cross-head, a second sleeve supported by said turret and depending theretrom inside of said standard. an apertured cup on a lower part of said second sleeve, a coiled spring interposed between said cup and thelower end of said-first sleeve, a pull-rod connected to said crosshead and extending down through said two sleeves, spring and cup, a leverfulcrumed at its rear end in said base and having a lswivel connection at its front endwith said pull-rod, a pedal outside of said base fulcrumedthereon at a higher level than the fulcrum of said lever, and a toggle connection between said pedal and an intermediate part ot' said lever.

2. In a machine ot the character described, the combination ol a base, a hollow standard extended upwardly therefrom, a head at the top of said standard, a turret revoluble on said head, rainsfslidable in bearings` in said turret, a cross-head carrying said rams, a

vfirst sleeve slidable in said turret carrying said cross-head, a second sleeve supported by said turret and depending therefrom inside of said standard, an apcrtured cup on a lower part of said second sleeve, a coiled spring interposed between said cup and the lowerend of said lirst sleeve, a pull-rod connected to said crosshead and extended down through said vtwo sleeves, spring and cup, a 'pedal fulerumed on said base, a spring tending to rock said pedalupwardly, a lever 'tulcrumed in said base and having a swivel connection with said pullsrod, and a toggle connection between Ysaid pedal and lever'.

3. In a machine of the character described, the combination of a base, a hollow standard extended upwardly therefrom, a head at the top of said standard, a turret revoluble on said head, rams slidable in bearings in said turret, a cross-headcarrying said rams, a

sleeve slidable in said turret carrying said cross-head, a pull-rod connected to said cross-head and extending down through said sleeve, a pedal 'tulcrumed on said base, spring means tending to rock said pedal upwardly, a lever tulcrumed in said base and having a swivel connection with said pullrod, and a toggle connection between said pedal and lever.

4. In a machine of the character described, the combination of a supporting-frame, a turret revoluble on said frame, rams slidable in bearings in said turret, a cross-head carrying said rams, a pull-rod connected to said cross-head and extending down through said frame, a pedal ulcrumed on said frame, spring means tending to rock said pedal upwardly, a lever fulcrumed in said frame and having a swivel connection with said pullrod, and a toggle connection between said pedal and lever.

5. In a machine of the character described, the combination of a supporting-frame, a turret rcvoluble on said frame, individuallyadjustable rams slidable in bearings in said turret, a cross-head carrying said rams, a pull-rod connected adjustably to said cross- `head and extending down through said frame, a pedal fulcrumed on said frame, a spring tending to rock said pedal upwardly, a lever tulcrunied in said frame and having a swivel connection with said pull-rod, and it toggle connection between said pedal and ever;

6. In a machine ofthe character described, the combination of a supporting-frame, a turret revoluble on said frame, rams slidable in bearings in said turret, a cross-head carrying said rams, a pull-rod connected to said cross-head, a pedal fuicrumed on said frame, and aftoggle connected between said pedal and pui1-rod.

7 In 'a machine of the character described, the combination ofk a support, a turret on said support, a plurality of rams Slidable in bearings in said turret, a cross-head having open-ended slots, and nuts in said slots bearing on curved surfaces of the cross-head adjacent to said slots, said rams having screw threads fitting in said nuts, whereby the rams may he easily adjusted or rremoved from the machine.

Inwitness whereof we have hereunto set our hands. K

Gr. E. WEAVER.

HARRY C. BUFFINGTON. 

